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proc: use seq_puts()/seq_putc() where possible
[linux-2.6/next.git] / drivers / net / wireless / b43 / lo.c
blob94e4f1378fc3c5660bd42b008c3e6384768d798d
1 /*
2
3 Broadcom B43 wireless driver
4
5 G PHY LO (LocalOscillator) Measuring and Control routines
6
7 Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
8 Copyright (c) 2005, 2006 Stefano Brivio <stefano.brivio@polimi.it>
9 Copyright (c) 2005-2007 Michael Buesch <mb@bu3sch.de>
10 Copyright (c) 2005, 2006 Danny van Dyk <kugelfang@gentoo.org>
11 Copyright (c) 2005, 2006 Andreas Jaggi <andreas.jaggi@waterwave.ch>
12
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
17
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with this program; see the file COPYING. If not, write to
25 the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
26 Boston, MA 02110-1301, USA.
27
28 */
29
30 #include "b43.h"
31 #include "lo.h"
32 #include "phy_g.h"
33 #include "main.h"
34
35 #include <linux/delay.h>
36 #include <linux/sched.h>
37 #include <linux/slab.h>
38
39
40 static struct b43_lo_calib *b43_find_lo_calib(struct b43_txpower_lo_control *lo,
41 const struct b43_bbatt *bbatt,
42 const struct b43_rfatt *rfatt)
43 {
44 struct b43_lo_calib *c;
45
46 list_for_each_entry(c, &lo->calib_list, list) {
47 if (!b43_compare_bbatt(&c->bbatt, bbatt))
48 continue;
49 if (!b43_compare_rfatt(&c->rfatt, rfatt))
50 continue;
51 return c;
52 }
53
54 return NULL;
55 }
56
57 /* Write the LocalOscillator Control (adjust) value-pair. */
58 static void b43_lo_write(struct b43_wldev *dev, struct b43_loctl *control)
59 {
60 struct b43_phy *phy = &dev->phy;
61 u16 value;
62
63 if (B43_DEBUG) {
64 if (unlikely(abs(control->i) > 16 || abs(control->q) > 16)) {
65 b43dbg(dev->wl, "Invalid LO control pair "
66 "(I: %d, Q: %d)\n", control->i, control->q);
67 dump_stack();
68 return;
69 }
70 }
71 B43_WARN_ON(phy->type != B43_PHYTYPE_G);
72
73 value = (u8) (control->q);
74 value |= ((u8) (control->i)) << 8;
75 b43_phy_write(dev, B43_PHY_LO_CTL, value);
76 }
77
78 static u16 lo_measure_feedthrough(struct b43_wldev *dev,
79 u16 lna, u16 pga, u16 trsw_rx)
80 {
81 struct b43_phy *phy = &dev->phy;
82 u16 rfover;
83 u16 feedthrough;
84
85 if (phy->gmode) {
86 lna <<= B43_PHY_RFOVERVAL_LNA_SHIFT;
87 pga <<= B43_PHY_RFOVERVAL_PGA_SHIFT;
88
89 B43_WARN_ON(lna & ~B43_PHY_RFOVERVAL_LNA);
90 B43_WARN_ON(pga & ~B43_PHY_RFOVERVAL_PGA);
91 /*FIXME This assertion fails B43_WARN_ON(trsw_rx & ~(B43_PHY_RFOVERVAL_TRSWRX |
92 B43_PHY_RFOVERVAL_BW));
93 */
94 trsw_rx &= (B43_PHY_RFOVERVAL_TRSWRX | B43_PHY_RFOVERVAL_BW);
95
96 /* Construct the RF Override Value */
97 rfover = B43_PHY_RFOVERVAL_UNK;
98 rfover |= pga;
99 rfover |= lna;
100 rfover |= trsw_rx;
101 if ((dev->dev->bus->sprom.boardflags_lo & B43_BFL_EXTLNA)
102 && phy->rev > 6)
103 rfover |= B43_PHY_RFOVERVAL_EXTLNA;
104
105 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
106 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
107 udelay(10);
108 rfover |= B43_PHY_RFOVERVAL_BW_LBW;
109 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
110 udelay(10);
111 rfover |= B43_PHY_RFOVERVAL_BW_LPF;
112 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
113 udelay(10);
114 b43_phy_write(dev, B43_PHY_PGACTL, 0xF300);
115 } else {
116 pga |= B43_PHY_PGACTL_UNKNOWN;
117 b43_phy_write(dev, B43_PHY_PGACTL, pga);
118 udelay(10);
119 pga |= B43_PHY_PGACTL_LOWBANDW;
120 b43_phy_write(dev, B43_PHY_PGACTL, pga);
121 udelay(10);
122 pga |= B43_PHY_PGACTL_LPF;
123 b43_phy_write(dev, B43_PHY_PGACTL, pga);
124 }
125 udelay(21);
126 feedthrough = b43_phy_read(dev, B43_PHY_LO_LEAKAGE);
127
128 /* This is a good place to check if we need to relax a bit,
129 * as this is the main function called regularly
130 * in the LO calibration. */
131 cond_resched();
132
133 return feedthrough;
134 }
135
136 /* TXCTL Register and Value Table.
137 * Returns the "TXCTL Register".
138 * "value" is the "TXCTL Value".
139 * "pad_mix_gain" is the PAD Mixer Gain.
140 */
141 static u16 lo_txctl_register_table(struct b43_wldev *dev,
142 u16 *value, u16 *pad_mix_gain)
143 {
144 struct b43_phy *phy = &dev->phy;
145 u16 reg, v, padmix;
146
147 if (phy->type == B43_PHYTYPE_B) {
148 v = 0x30;
149 if (phy->radio_rev <= 5) {
150 reg = 0x43;
151 padmix = 0;
152 } else {
153 reg = 0x52;
154 padmix = 5;
155 }
156 } else {
157 if (phy->rev >= 2 && phy->radio_rev == 8) {
158 reg = 0x43;
159 v = 0x10;
160 padmix = 2;
161 } else {
162 reg = 0x52;
163 v = 0x30;
164 padmix = 5;
165 }
166 }
167 if (value)
168 *value = v;
169 if (pad_mix_gain)
170 *pad_mix_gain = padmix;
171
172 return reg;
173 }
174
175 static void lo_measure_txctl_values(struct b43_wldev *dev)
176 {
177 struct b43_phy *phy = &dev->phy;
178 struct b43_phy_g *gphy = phy->g;
179 struct b43_txpower_lo_control *lo = gphy->lo_control;
180 u16 reg, mask;
181 u16 trsw_rx, pga;
182 u16 radio_pctl_reg;
183
184 static const u8 tx_bias_values[] = {
185 0x09, 0x08, 0x0A, 0x01, 0x00,
186 0x02, 0x05, 0x04, 0x06,
187 };
188 static const u8 tx_magn_values[] = {
189 0x70, 0x40,
190 };
191
192 if (!has_loopback_gain(phy)) {
193 radio_pctl_reg = 6;
194 trsw_rx = 2;
195 pga = 0;
196 } else {
197 int lb_gain; /* Loopback gain (in dB) */
198
199 trsw_rx = 0;
200 lb_gain = gphy->max_lb_gain / 2;
201 if (lb_gain > 10) {
202 radio_pctl_reg = 0;
203 pga = abs(10 - lb_gain) / 6;
204 pga = clamp_val(pga, 0, 15);
205 } else {
206 int cmp_val;
207 int tmp;
208
209 pga = 0;
210 cmp_val = 0x24;
211 if ((phy->rev >= 2) &&
212 (phy->radio_ver == 0x2050) && (phy->radio_rev == 8))
213 cmp_val = 0x3C;
214 tmp = lb_gain;
215 if ((10 - lb_gain) < cmp_val)
216 tmp = (10 - lb_gain);
217 if (tmp < 0)
218 tmp += 6;
219 else
220 tmp += 3;
221 cmp_val /= 4;
222 tmp /= 4;
223 if (tmp >= cmp_val)
224 radio_pctl_reg = cmp_val;
225 else
226 radio_pctl_reg = tmp;
227 }
228 }
229 b43_radio_maskset(dev, 0x43, 0xFFF0, radio_pctl_reg);
230 b43_gphy_set_baseband_attenuation(dev, 2);
231
232 reg = lo_txctl_register_table(dev, &mask, NULL);
233 mask = ~mask;
234 b43_radio_mask(dev, reg, mask);
235
236 if (has_tx_magnification(phy)) {
237 int i, j;
238 int feedthrough;
239 int min_feedth = 0xFFFF;
240 u8 tx_magn, tx_bias;
241
242 for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) {
243 tx_magn = tx_magn_values[i];
244 b43_radio_maskset(dev, 0x52, 0xFF0F, tx_magn);
245 for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
246 tx_bias = tx_bias_values[j];
247 b43_radio_maskset(dev, 0x52, 0xFFF0, tx_bias);
248 feedthrough =
249 lo_measure_feedthrough(dev, 0, pga,
250 trsw_rx);
251 if (feedthrough < min_feedth) {
252 lo->tx_bias = tx_bias;
253 lo->tx_magn = tx_magn;
254 min_feedth = feedthrough;
255 }
256 if (lo->tx_bias == 0)
257 break;
258 }
259 b43_radio_write16(dev, 0x52,
260 (b43_radio_read16(dev, 0x52)
261 & 0xFF00) | lo->tx_bias | lo->
262 tx_magn);
263 }
264 } else {
265 lo->tx_magn = 0;
266 lo->tx_bias = 0;
267 b43_radio_mask(dev, 0x52, 0xFFF0); /* TX bias == 0 */
268 }
269 lo->txctl_measured_time = jiffies;
270 }
271
272 static void lo_read_power_vector(struct b43_wldev *dev)
273 {
274 struct b43_phy *phy = &dev->phy;
275 struct b43_phy_g *gphy = phy->g;
276 struct b43_txpower_lo_control *lo = gphy->lo_control;
277 int i;
278 u64 tmp;
279 u64 power_vector = 0;
280
281 for (i = 0; i < 8; i += 2) {
282 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
283 power_vector |= (tmp << (i * 8));
284 /* Clear the vector on the device. */
285 b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
286 }
287 if (power_vector)
288 lo->power_vector = power_vector;
289 lo->pwr_vec_read_time = jiffies;
290 }
291
292 /* 802.11/LO/GPHY/MeasuringGains */
293 static void lo_measure_gain_values(struct b43_wldev *dev,
294 s16 max_rx_gain, int use_trsw_rx)
295 {
296 struct b43_phy *phy = &dev->phy;
297 struct b43_phy_g *gphy = phy->g;
298 u16 tmp;
299
300 if (max_rx_gain < 0)
301 max_rx_gain = 0;
302
303 if (has_loopback_gain(phy)) {
304 int trsw_rx = 0;
305 int trsw_rx_gain;
306
307 if (use_trsw_rx) {
308 trsw_rx_gain = gphy->trsw_rx_gain / 2;
309 if (max_rx_gain >= trsw_rx_gain) {
310 trsw_rx_gain = max_rx_gain - trsw_rx_gain;
311 trsw_rx = 0x20;
312 }
313 } else
314 trsw_rx_gain = max_rx_gain;
315 if (trsw_rx_gain < 9) {
316 gphy->lna_lod_gain = 0;
317 } else {
318 gphy->lna_lod_gain = 1;
319 trsw_rx_gain -= 8;
320 }
321 trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
322 gphy->pga_gain = trsw_rx_gain / 3;
323 if (gphy->pga_gain >= 5) {
324 gphy->pga_gain -= 5;
325 gphy->lna_gain = 2;
326 } else
327 gphy->lna_gain = 0;
328 } else {
329 gphy->lna_gain = 0;
330 gphy->trsw_rx_gain = 0x20;
331 if (max_rx_gain >= 0x14) {
332 gphy->lna_lod_gain = 1;
333 gphy->pga_gain = 2;
334 } else if (max_rx_gain >= 0x12) {
335 gphy->lna_lod_gain = 1;
336 gphy->pga_gain = 1;
337 } else if (max_rx_gain >= 0xF) {
338 gphy->lna_lod_gain = 1;
339 gphy->pga_gain = 0;
340 } else {
341 gphy->lna_lod_gain = 0;
342 gphy->pga_gain = 0;
343 }
344 }
345
346 tmp = b43_radio_read16(dev, 0x7A);
347 if (gphy->lna_lod_gain == 0)
348 tmp &= ~0x0008;
349 else
350 tmp |= 0x0008;
351 b43_radio_write16(dev, 0x7A, tmp);
352 }
353
354 struct lo_g_saved_values {
355 u8 old_channel;
356
357 /* Core registers */
358 u16 reg_3F4;
359 u16 reg_3E2;
360
361 /* PHY registers */
362 u16 phy_lo_mask;
363 u16 phy_extg_01;
364 u16 phy_dacctl_hwpctl;
365 u16 phy_dacctl;
366 u16 phy_cck_14;
367 u16 phy_hpwr_tssictl;
368 u16 phy_analogover;
369 u16 phy_analogoverval;
370 u16 phy_rfover;
371 u16 phy_rfoverval;
372 u16 phy_classctl;
373 u16 phy_cck_3E;
374 u16 phy_crs0;
375 u16 phy_pgactl;
376 u16 phy_cck_2A;
377 u16 phy_syncctl;
378 u16 phy_cck_30;
379 u16 phy_cck_06;
380
381 /* Radio registers */
382 u16 radio_43;
383 u16 radio_7A;
384 u16 radio_52;
385 };
386
387 static void lo_measure_setup(struct b43_wldev *dev,
388 struct lo_g_saved_values *sav)
389 {
390 struct ssb_sprom *sprom = &dev->dev->bus->sprom;
391 struct b43_phy *phy = &dev->phy;
392 struct b43_phy_g *gphy = phy->g;
393 struct b43_txpower_lo_control *lo = gphy->lo_control;
394 u16 tmp;
395
396 if (b43_has_hardware_pctl(dev)) {
397 sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
398 sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
399 sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
400 sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
401 sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
402
403 b43_phy_set(dev, B43_PHY_HPWR_TSSICTL, 0x100);
404 b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40);
405 b43_phy_set(dev, B43_PHY_DACCTL, 0x40);
406 b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200);
407 }
408 if (phy->type == B43_PHYTYPE_B &&
409 phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
410 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
411 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
412 }
413 if (phy->rev >= 2) {
414 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
415 sav->phy_analogoverval =
416 b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
417 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
418 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
419 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
420 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
421 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
422
423 b43_phy_mask(dev, B43_PHY_CLASSCTL, 0xFFFC);
424 b43_phy_mask(dev, B43_PHY_CRS0, 0x7FFF);
425 b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003);
426 b43_phy_mask(dev, B43_PHY_ANALOGOVERVAL, 0xFFFC);
427 if (phy->type == B43_PHYTYPE_G) {
428 if ((phy->rev >= 7) &&
429 (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
430 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
431 } else {
432 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
433 }
434 } else {
435 b43_phy_write(dev, B43_PHY_RFOVER, 0);
436 }
437 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
438 }
439 sav->reg_3F4 = b43_read16(dev, 0x3F4);
440 sav->reg_3E2 = b43_read16(dev, 0x3E2);
441 sav->radio_43 = b43_radio_read16(dev, 0x43);
442 sav->radio_7A = b43_radio_read16(dev, 0x7A);
443 sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
444 sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
445 sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
446 sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
447
448 if (!has_tx_magnification(phy)) {
449 sav->radio_52 = b43_radio_read16(dev, 0x52);
450 sav->radio_52 &= 0x00F0;
451 }
452 if (phy->type == B43_PHYTYPE_B) {
453 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
454 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
455 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
456 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
457 } else {
458 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
459 | 0x8000);
460 }
461 b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
462 & 0xF000);
463
464 tmp =
465 (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
466 b43_phy_write(dev, tmp, 0x007F);
467
468 tmp = sav->phy_syncctl;
469 b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
470 tmp = sav->radio_7A;
471 b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
472
473 b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
474 if (phy->type == B43_PHYTYPE_G ||
475 (phy->type == B43_PHYTYPE_B &&
476 phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
477 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
478 } else
479 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
480 if (phy->rev >= 2)
481 b43_dummy_transmission(dev, false, true);
482 b43_gphy_channel_switch(dev, 6, 0);
483 b43_radio_read16(dev, 0x51); /* dummy read */
484 if (phy->type == B43_PHYTYPE_G)
485 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
486
487 /* Re-measure the txctl values, if needed. */
488 if (time_before(lo->txctl_measured_time,
489 jiffies - B43_LO_TXCTL_EXPIRE))
490 lo_measure_txctl_values(dev);
491
492 if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
493 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
494 } else {
495 if (phy->type == B43_PHYTYPE_B)
496 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
497 else
498 b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
499 }
500 }
501
502 static void lo_measure_restore(struct b43_wldev *dev,
503 struct lo_g_saved_values *sav)
504 {
505 struct b43_phy *phy = &dev->phy;
506 struct b43_phy_g *gphy = phy->g;
507 u16 tmp;
508
509 if (phy->rev >= 2) {
510 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
511 tmp = (gphy->pga_gain << 8);
512 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
513 udelay(5);
514 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
515 udelay(2);
516 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
517 } else {
518 tmp = (gphy->pga_gain | 0xEFA0);
519 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
520 }
521 if (phy->type == B43_PHYTYPE_G) {
522 if (phy->rev >= 3)
523 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
524 else
525 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
526 if (phy->rev >= 2)
527 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
528 else
529 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
530 }
531 b43_write16(dev, 0x3F4, sav->reg_3F4);
532 b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
533 b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
534 b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
535 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
536 b43_radio_write16(dev, 0x43, sav->radio_43);
537 b43_radio_write16(dev, 0x7A, sav->radio_7A);
538 if (!has_tx_magnification(phy)) {
539 tmp = sav->radio_52;
540 b43_radio_maskset(dev, 0x52, 0xFF0F, tmp);
541 }
542 b43_write16(dev, 0x3E2, sav->reg_3E2);
543 if (phy->type == B43_PHYTYPE_B &&
544 phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
545 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
546 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
547 }
548 if (phy->rev >= 2) {
549 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
550 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
551 sav->phy_analogoverval);
552 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
553 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
554 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
555 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
556 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
557 }
558 if (b43_has_hardware_pctl(dev)) {
559 tmp = (sav->phy_lo_mask & 0xBFFF);
560 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
561 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
562 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
563 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
564 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
565 }
566 b43_gphy_channel_switch(dev, sav->old_channel, 1);
567 }
568
569 struct b43_lo_g_statemachine {
570 int current_state;
571 int nr_measured;
572 int state_val_multiplier;
573 u16 lowest_feedth;
574 struct b43_loctl min_loctl;
575 };
576
577 /* Loop over each possible value in this state. */
578 static int lo_probe_possible_loctls(struct b43_wldev *dev,
579 struct b43_loctl *probe_loctl,
580 struct b43_lo_g_statemachine *d)
581 {
582 struct b43_phy *phy = &dev->phy;
583 struct b43_phy_g *gphy = phy->g;
584 struct b43_loctl test_loctl;
585 struct b43_loctl orig_loctl;
586 struct b43_loctl prev_loctl = {
587 .i = -100,
588 .q = -100,
589 };
590 int i;
591 int begin, end;
592 int found_lower = 0;
593 u16 feedth;
594
595 static const struct b43_loctl modifiers[] = {
596 {.i = 1,.q = 1,},
597 {.i = 1,.q = 0,},
598 {.i = 1,.q = -1,},
599 {.i = 0,.q = -1,},
600 {.i = -1,.q = -1,},
601 {.i = -1,.q = 0,},
602 {.i = -1,.q = 1,},
603 {.i = 0,.q = 1,},
604 };
605
606 if (d->current_state == 0) {
607 begin = 1;
608 end = 8;
609 } else if (d->current_state % 2 == 0) {
610 begin = d->current_state - 1;
611 end = d->current_state + 1;
612 } else {
613 begin = d->current_state - 2;
614 end = d->current_state + 2;
615 }
616 if (begin < 1)
617 begin += 8;
618 if (end > 8)
619 end -= 8;
620
621 memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
622 i = begin;
623 d->current_state = i;
624 while (1) {
625 B43_WARN_ON(!(i >= 1 && i <= 8));
626 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
627 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
628 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
629 if ((test_loctl.i != prev_loctl.i ||
630 test_loctl.q != prev_loctl.q) &&
631 (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
632 b43_lo_write(dev, &test_loctl);
633 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
634 gphy->pga_gain,
635 gphy->trsw_rx_gain);
636 if (feedth < d->lowest_feedth) {
637 memcpy(probe_loctl, &test_loctl,
638 sizeof(struct b43_loctl));
639 found_lower = 1;
640 d->lowest_feedth = feedth;
641 if ((d->nr_measured < 2) &&
642 !has_loopback_gain(phy))
643 break;
644 }
645 }
646 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
647 if (i == end)
648 break;
649 if (i == 8)
650 i = 1;
651 else
652 i++;
653 d->current_state = i;
654 }
655
656 return found_lower;
657 }
658
659 static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
660 struct b43_loctl *loctl,
661 int *max_rx_gain)
662 {
663 struct b43_phy *phy = &dev->phy;
664 struct b43_phy_g *gphy = phy->g;
665 struct b43_lo_g_statemachine d;
666 u16 feedth;
667 int found_lower;
668 struct b43_loctl probe_loctl;
669 int max_repeat = 1, repeat_cnt = 0;
670
671 d.nr_measured = 0;
672 d.state_val_multiplier = 1;
673 if (has_loopback_gain(phy))
674 d.state_val_multiplier = 3;
675
676 memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
677 if (has_loopback_gain(phy))
678 max_repeat = 4;
679 do {
680 b43_lo_write(dev, &d.min_loctl);
681 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
682 gphy->pga_gain,
683 gphy->trsw_rx_gain);
684 if (feedth < 0x258) {
685 if (feedth >= 0x12C)
686 *max_rx_gain += 6;
687 else
688 *max_rx_gain += 3;
689 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
690 gphy->pga_gain,
691 gphy->trsw_rx_gain);
692 }
693 d.lowest_feedth = feedth;
694
695 d.current_state = 0;
696 do {
697 B43_WARN_ON(!
698 (d.current_state >= 0
699 && d.current_state <= 8));
700 memcpy(&probe_loctl, &d.min_loctl,
701 sizeof(struct b43_loctl));
702 found_lower =
703 lo_probe_possible_loctls(dev, &probe_loctl, &d);
704 if (!found_lower)
705 break;
706 if ((probe_loctl.i == d.min_loctl.i) &&
707 (probe_loctl.q == d.min_loctl.q))
708 break;
709 memcpy(&d.min_loctl, &probe_loctl,
710 sizeof(struct b43_loctl));
711 d.nr_measured++;
712 } while (d.nr_measured < 24);
713 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
714
715 if (has_loopback_gain(phy)) {
716 if (d.lowest_feedth > 0x1194)
717 *max_rx_gain -= 6;
718 else if (d.lowest_feedth < 0x5DC)
719 *max_rx_gain += 3;
720 if (repeat_cnt == 0) {
721 if (d.lowest_feedth <= 0x5DC) {
722 d.state_val_multiplier = 1;
723 repeat_cnt++;
724 } else
725 d.state_val_multiplier = 2;
726 } else if (repeat_cnt == 2)
727 d.state_val_multiplier = 1;
728 }
729 lo_measure_gain_values(dev, *max_rx_gain,
730 has_loopback_gain(phy));
731 } while (++repeat_cnt < max_repeat);
732 }
733
734 static
735 struct b43_lo_calib *b43_calibrate_lo_setting(struct b43_wldev *dev,
736 const struct b43_bbatt *bbatt,
737 const struct b43_rfatt *rfatt)
738 {
739 struct b43_phy *phy = &dev->phy;
740 struct b43_phy_g *gphy = phy->g;
741 struct b43_loctl loctl = {
742 .i = 0,
743 .q = 0,
744 };
745 int max_rx_gain;
746 struct b43_lo_calib *cal;
747 struct lo_g_saved_values uninitialized_var(saved_regs);
748 /* Values from the "TXCTL Register and Value Table" */
749 u16 txctl_reg;
750 u16 txctl_value;
751 u16 pad_mix_gain;
752
753 saved_regs.old_channel = phy->channel;
754 b43_mac_suspend(dev);
755 lo_measure_setup(dev, &saved_regs);
756
757 txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
758
759 b43_radio_maskset(dev, 0x43, 0xFFF0, rfatt->att);
760 b43_radio_maskset(dev, txctl_reg, ~txctl_value, (rfatt->with_padmix ? txctl_value :0));
761
762 max_rx_gain = rfatt->att * 2;
763 max_rx_gain += bbatt->att / 2;
764 if (rfatt->with_padmix)
765 max_rx_gain -= pad_mix_gain;
766 if (has_loopback_gain(phy))
767 max_rx_gain += gphy->max_lb_gain;
768 lo_measure_gain_values(dev, max_rx_gain,
769 has_loopback_gain(phy));
770
771 b43_gphy_set_baseband_attenuation(dev, bbatt->att);
772 lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
773
774 lo_measure_restore(dev, &saved_regs);
775 b43_mac_enable(dev);
776
777 if (b43_debug(dev, B43_DBG_LO)) {
778 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
779 "=> I=%d Q=%d\n",
780 bbatt->att, rfatt->att, rfatt->with_padmix,
781 loctl.i, loctl.q);
782 }
783
784 cal = kmalloc(sizeof(*cal), GFP_KERNEL);
785 if (!cal) {
786 b43warn(dev->wl, "LO calib: out of memory\n");
787 return NULL;
788 }
789 memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
790 memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
791 memcpy(&cal->ctl, &loctl, sizeof(loctl));
792 cal->calib_time = jiffies;
793 INIT_LIST_HEAD(&cal->list);
794
795 return cal;
796 }
797
798 /* Get a calibrated LO setting for the given attenuation values.
799 * Might return a NULL pointer under OOM! */
800 static
801 struct b43_lo_calib *b43_get_calib_lo_settings(struct b43_wldev *dev,
802 const struct b43_bbatt *bbatt,
803 const struct b43_rfatt *rfatt)
804 {
805 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
806 struct b43_lo_calib *c;
807
808 c = b43_find_lo_calib(lo, bbatt, rfatt);
809 if (c)
810 return c;
811 /* Not in the list of calibrated LO settings.
812 * Calibrate it now. */
813 c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
814 if (!c)
815 return NULL;
816 list_add(&c->list, &lo->calib_list);
817
818 return c;
819 }
820
821 void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
822 {
823 struct b43_phy *phy = &dev->phy;
824 struct b43_phy_g *gphy = phy->g;
825 struct b43_txpower_lo_control *lo = gphy->lo_control;
826 int i;
827 int rf_offset, bb_offset;
828 const struct b43_rfatt *rfatt;
829 const struct b43_bbatt *bbatt;
830 u64 power_vector;
831 bool table_changed = 0;
832
833 BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
834 B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
835
836 power_vector = lo->power_vector;
837 if (!update_all && !power_vector)
838 return; /* Nothing to do. */
839
840 /* Suspend the MAC now to avoid continuous suspend/enable
841 * cycles in the loop. */
842 b43_mac_suspend(dev);
843
844 for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
845 struct b43_lo_calib *cal;
846 int idx;
847 u16 val;
848
849 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
850 continue;
851 /* Update the table entry for this power_vector bit.
852 * The table rows are RFatt entries and columns are BBatt. */
853 bb_offset = i / lo->rfatt_list.len;
854 rf_offset = i % lo->rfatt_list.len;
855 bbatt = &(lo->bbatt_list.list[bb_offset]);
856 rfatt = &(lo->rfatt_list.list[rf_offset]);
857
858 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
859 if (!cal) {
860 b43warn(dev->wl, "LO: Could not "
861 "calibrate DC table entry\n");
862 continue;
863 }
864 /*FIXME: Is Q really in the low nibble? */
865 val = (u8)(cal->ctl.q);
866 val |= ((u8)(cal->ctl.i)) << 4;
867 kfree(cal);
868
869 /* Get the index into the hardware DC LT. */
870 idx = i / 2;
871 /* Change the table in memory. */
872 if (i % 2) {
873 /* Change the high byte. */
874 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
875 | ((val & 0x00FF) << 8);
876 } else {
877 /* Change the low byte. */
878 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
879 | (val & 0x00FF);
880 }
881 table_changed = 1;
882 }
883 if (table_changed) {
884 /* The table changed in memory. Update the hardware table. */
885 for (i = 0; i < B43_DC_LT_SIZE; i++)
886 b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
887 }
888 b43_mac_enable(dev);
889 }
890
891 /* Fixup the RF attenuation value for the case where we are
892 * using the PAD mixer. */
893 static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
894 {
895 if (!rf->with_padmix)
896 return;
897 if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
898 rf->att = 4;
899 }
900
901 void b43_lo_g_adjust(struct b43_wldev *dev)
902 {
903 struct b43_phy_g *gphy = dev->phy.g;
904 struct b43_lo_calib *cal;
905 struct b43_rfatt rf;
906
907 memcpy(&rf, &gphy->rfatt, sizeof(rf));
908 b43_lo_fixup_rfatt(&rf);
909
910 cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
911 if (!cal)
912 return;
913 b43_lo_write(dev, &cal->ctl);
914 }
915
916 void b43_lo_g_adjust_to(struct b43_wldev *dev,
917 u16 rfatt, u16 bbatt, u16 tx_control)
918 {
919 struct b43_rfatt rf;
920 struct b43_bbatt bb;
921 struct b43_lo_calib *cal;
922
923 memset(&rf, 0, sizeof(rf));
924 memset(&bb, 0, sizeof(bb));
925 rf.att = rfatt;
926 bb.att = bbatt;
927 b43_lo_fixup_rfatt(&rf);
928 cal = b43_get_calib_lo_settings(dev, &bb, &rf);
929 if (!cal)
930 return;
931 b43_lo_write(dev, &cal->ctl);
932 }
933
934 /* Periodic LO maintanance work */
935 void b43_lo_g_maintanance_work(struct b43_wldev *dev)
936 {
937 struct b43_phy *phy = &dev->phy;
938 struct b43_phy_g *gphy = phy->g;
939 struct b43_txpower_lo_control *lo = gphy->lo_control;
940 unsigned long now;
941 unsigned long expire;
942 struct b43_lo_calib *cal, *tmp;
943 bool current_item_expired = 0;
944 bool hwpctl;
945
946 if (!lo)
947 return;
948 now = jiffies;
949 hwpctl = b43_has_hardware_pctl(dev);
950
951 if (hwpctl) {
952 /* Read the power vector and update it, if needed. */
953 expire = now - B43_LO_PWRVEC_EXPIRE;
954 if (time_before(lo->pwr_vec_read_time, expire)) {
955 lo_read_power_vector(dev);
956 b43_gphy_dc_lt_init(dev, 0);
957 }
958 //FIXME Recalc the whole DC table from time to time?
959 }
960
961 if (hwpctl)
962 return;
963 /* Search for expired LO settings. Remove them.
964 * Recalibrate the current setting, if expired. */
965 expire = now - B43_LO_CALIB_EXPIRE;
966 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
967 if (!time_before(cal->calib_time, expire))
968 continue;
969 /* This item expired. */
970 if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
971 b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
972 B43_WARN_ON(current_item_expired);
973 current_item_expired = 1;
974 }
975 if (b43_debug(dev, B43_DBG_LO)) {
976 b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
977 "I=%d, Q=%d expired\n",
978 cal->bbatt.att, cal->rfatt.att,
979 cal->rfatt.with_padmix,
980 cal->ctl.i, cal->ctl.q);
981 }
982 list_del(&cal->list);
983 kfree(cal);
984 }
985 if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
986 /* Recalibrate currently used LO setting. */
987 if (b43_debug(dev, B43_DBG_LO))
988 b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
989 cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
990 if (cal) {
991 list_add(&cal->list, &lo->calib_list);
992 b43_lo_write(dev, &cal->ctl);
993 } else
994 b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
995 }
996 }
997
998 void b43_lo_g_cleanup(struct b43_wldev *dev)
999 {
1000 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
1001 struct b43_lo_calib *cal, *tmp;
1002
1003 if (!lo)
1004 return;
1005 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
1006 list_del(&cal->list);
1007 kfree(cal);
1008 }
1009 }
1010
1011 /* LO Initialization */
1012 void b43_lo_g_init(struct b43_wldev *dev)
1013 {
1014 if (b43_has_hardware_pctl(dev)) {
1015 lo_read_power_vector(dev);
1016 b43_gphy_dc_lt_init(dev, 1);
1017 }
1018 }
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